Water-tube boiler.



No. 866,103. I PATENTBD SEPT. 17, 1907,.

G. H. WHELDON & 0. W. GURLE.

WATER TUBE BOILER.

APPLICATION FILED DEC. 20. 1906.

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No. 866,103. PATENTED SEPT. 17, 1907;

' G. H. WHELDON 8; G. W. CURLB.

WATERTUBE BOILER.

APPLICATION FILED DEO.20,190'6.

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UNITED STATES PATENT OFFICE.

GEORGE H. WHELDON AND CHARLES W. CURLE, OF MINNEAPOLIS, MINNESOTA.

WATER-TUBE BOILER.

Specification of Letters Patent.

Patented Sept. 17, 1907.

To all whom it may concern:

Be it known that we, GEORGE I-I. WI-rELnoN and CHARLES W. OURLE, citizens of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Water-Tube Boilers and Heaters; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the $1116.

Our invention relates -to that type of boiler or hot water heater generally designated as water tube boilers or heaters, and has for its object to improve the same in point of increased efficiency or economy in the use of fuel.

To the above ends, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a sectional view taken from front to rear, approximately on the line 1: x of Fig. 2, showing a boiler or hot water heater designed in accordance with our invention; and Fig. 2

, is a transverse vertical section taken approximately on r the line 95 x of Fig. 1.

' legs 6.

The numeral 1 indicates the casing, preferably in the form of masonry, and preferably having approximately rectangular form. This casing, in its front wall, is pro vided with a fuel inlet passage 2 that is adapted to be closed by the usual door, and below said passage 2 with a passage 3 that opens into the ash pit or lower portion of the casing and is adapted to be closed by the usual door. In the upper portion of the rear wall of the casing or masonry 1., is an outlet passage 4 to which the smoke stack or flue not shown) would connect.

Extending transversely of the forward portion of the casing 1, just below the opening 2 and preferably embedded partly in the masonry, is a horizontal cold water inlet pipe 5 which, on opposite sides of said door opening 2, is provided with vertically extended water Extending transversely through the upper portion of the casing, but preferably below the outlet passage 4 and embedded partly in the masonry is a hot water outlet pipe 7 having horizontally extended waterlegs 7. The grate or fuel supporting bottom to the fire box is in accordance with our invention formed by a plurality of approximately horizontal laterally spaced water tubes 8 that'extend from the water inlet pipe 5 to the rear wall of the masonry (by which latter they are sup ported), thence vertically upward, as indicated at 8',

' to form a rear grating to the fire box. From the upper ends of the vertical tube sections 8, the said water tubes 8 are extended in the form of alternately disposed same vertical plane.

approximately Ushaped loops 8 the upper extremities of which join and open into the outlet pipe 7. The lowermost of the loops 8', it will be noted, directly overlie the lower pipe sections 8 by which the fuel is supported.

At the sides'of the fire box are other water tubes that are directly subject to the flames from the burning fuel in the fire box and which also assist in holding the fuel within the proper bounds. These water tubes 9 are approximately L-shaped and the ends of their horizontally extended portions lead directly from the vertical water legs 6, while the upper endsof their upright portions open directly into the water legs 7 of the water outlet pipe 7. The said pipes 9 are, therefore, arranged in two laterally spaced series with the members of each series lying in the same or approximately the Those portions of the several tubes which have been described as horizontal-or approximately horizontal, are preferably slightly inclined, being given a slight rise in the direction of the travel of the hot water therethrough, to thereby facilitate the flow of water under the action of convection.

The numeral 10 indicates horizontal baffle plates, the lower of which projects rearward from the front wall of the casing, and the upper of which projects forward from the rear wall of the casing. These two baflle plates act as deflectors to cause the flames or products of combustion to take a zig-zag or winding upward course and thereby to come into more thorough contact with the watertubes; For instance, in passing between the two baffle plates, the flamesare caused to travel from the rear toward the front of the casing along the intervening laterally spaced water tubes 8 By this arrangement, therefore, a boiler or hot water heater of very high capacity is provided. I

The apparatus above described was primarily designed as a hot water heater for heating systems, but is capable of general use wherever a hot water heater or a steam generator is desired. When used as a steam generator, a suitable dome orreceptacle for the generated steam would preferably be provided.

What we claim is:

1. In a hot water heater or boiler, the combination with a casing, of laterally spaced water tubes located in two series, one series being on each side of said casing, other laterally spaced water tubes taking zig zag courses upward through the combustion chamber, and closely positioned throughout the space between said first noted water tubes, substantially as described.

- 2. In a hot water heater or boiler, the combination with a casing having a fuel inlet passage 2, of a water supply pipe 5 located below said passage 2 and having upright water legs 6 on the opposite sides of said passage-2, a water outlet pipe 7 extending transversely across the rear upper portion of said casing and provided with forwardly projecting water legs 7, laterally spaced water tubes 8 extending rearward from said water pipe 5 and constituting a grate or fuel supporting bottom of the fire box,

said tubes 8 having vertical extensions 8" and alternately horizontal reversely projected overlapping ballie plates looped sections 8 which latter open into the said outlet interposed between the said zig zag water tubes, substan: pipe 7 and the laterally spaced series of approximately L- tially as described.

shaped pipe 9 leading from said upright legs 6 to said In testimony whereof we affix our signature in presence 5 inwardly projecting legs 7, substantially as described. of two witnesses.

3. In a hot water heater" or boiler, the combination with I GEORGE H. WHELDON. a casing, of laterally spaced water tubes located in two I CHARLES W. CURDE. series, one series being on each side of said casing, other Witnesses: laterally spaced water tubes taking zig zag courses up- MALIE Honn,

10 ward through the combustion chamber, and approximately F. D. MERCHANT. 

